9 out of 10 cheerleaders are 64″ tall. The 10th cheerleader is 60″ tall. If they build a human pyramid, where 4 girls are on the bottom, 3 stand on top of the 4, 2 stand on top of the 3 and the …👇

9 out of 10 cheerleaders are 64″ tall. The 10th cheerleader is 60″ tall. If they build a human pyramid, where 4 girls are on the bottom, 3 stand on top of the 4, 2 stand on top of the 3 and the shortest girl is at the top, how tall is the human pyramid in feet?